Sod is used to create attractive lawns and usable turf areas quickly. The advantages to using sod are it is quick and easy to install, needs little care other than watering to become established and it can be planted in any season. Sod can be grown by the home gardener in small quantities in a greenhouse. Sod grown in a greenhouse allows you to repair bare patches of your yard.
Prepare the greenhouse for sod production. Clean all surfaces to get rid of fungi, bacteria and insects that may have accumulated.
Mix sterile potting soil and sterile compost, both available from your local garden center. Use a 50-50 mix of sterile potting soil and sterile compost. Store in a large trash can.
Fill seed flats with potting soil mixture. Use a seed flat that does not have dividers and has a depth of 3 inches. Fill three-quarters full with potting soil mixture.
Spread grass seed over the potting soil mixture. Consult your local garden center for the appropriate grass seed for your locality. Cover the grass seed with one-quarter inch of potting soil mixture.
Water the seed flats daily to keep the potting soil mixture moist to encourage germination. Seeds will germinate in seven to 10 days. Reduce watering to every other day.
Harvest sod in 12 to 16 weeks. Carefully lift one end of the sod and slide it out of the seed flat. Stack the sod on a pallet.